Bad Render. Too much Noise. Low Light
For scenes where the light bounces around a lot (think indoor scenes) you're going to need more samples.  Renders that look good at only 50 samples are probably more open than yours.  

That being said, setting max bounces to 0 will get rid of your fireflies, but you will also lose all of the nice bounce lighting.  And at that point you might as well use the blender internal.  My advice is to turn up your samples and go get a cup of coffee.  I wouldn't worry about it.